Con Ed told New Yorkers yesterday it’s unlikely they will face a repetition of the blackouts caused by a fire in an East Side transformer Saturday.

“Everything is OK,” said John Banks, a Con Ed vice president.

“We got all the power back on, and we don’t anticipate any problems.”

The company expressed confidence it could provide power without interruptions throughout the summer.

A fiery explosion at the East River Generating Station on the Lower East Side left 65,000 of the utility’s downtown customers in the dark for nine hours.

One transformer was completely charred.

The transformer that caught fire was one of 10 in the substation, so the others picked up where the damaged one stopped, officials said.

“We have redundancies,” said spokesman Mike Clendenin.

“We have backups to backups. Even though the fire caused a significant amount of damage to the transformer and power lines, we’re still able to put a box around the problem and have everything back on.”

The cause of the fire – which injured no one – was still undetermined.

But officials said the “charred wreck” of the transformer would be removed to a laboratory for analysis.

One theory was that a short circuit sparked an instantaneous fire.

Clendenin said more than 200 engineers and electricians worked around the clock to isolate the transformer and run cables around it to ensure that power stays uninterrupted.

But city officials joined Con Ed in warning residents to conserve energy, since the substation was now working at less than 100 percent.

“[We] are asking customers to limit their use of nonessential appliances and electronic equipment,” said John Odermatt, commissioner of the Office of Emergency Management.